html,
body,
div,
span,
applet,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
strong,
sub,
sup,
tt,
var,
b,
u,
i,
center,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
embed,
figure,
figcaption,
footer,
header,
hgroup,
menu,
nav,
output,
ruby,
section,
summary,
time,
mark,
audio,
video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}
article,
aside,
details,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
  display: block;
}
ol,
ul {
  list-style: none;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
* {
  font-family: Verdana;
}
body {
  width: 100%;
  height: 100vh;
  overflow: hidden;
  background-color: #5f5d2c;
  line-height: 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.i-menu {
  height: 10vh;
  padding: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.i-menu__item {
  padding: 10px;
  color: #a9a971;
  font-weight: bold;
  text-decoration: none;
}
.i-menu__item_active {
  color: #c67eb0;
  border-bottom: 2px solid #f36d52;
}
.i-main {
  position: absolute;
  top: 10vh;
  width: 100vw;
  height: 90vh;
  overflow: scroll;
}
.i-main__content {
  margin: 0;
  padding: 0;
  display: block;
  border: none;
  background: #000 url("http://www.x3dom.org/x3dom/example/texture/solarSystem/starsbg.png");
  background-size: cover;
}
.i-intro {
  margin: 10px;
  padding: 20px;
  color: #f36d52;
  font-size: 28px;
  font-weight: bold;
  border-left: 4px solid #c67eb0;
}
.i-panel {
  z-index: 1000;
  position: absolute;
  top: 100px;
  left: 10px;
  width: 100px;
  height: 200px;
  padding: 20px;
  display: flex;
  flex-flow: row wrap;
  justify-content: space-between;
  background: #96929e;
  border-right: 5px solid #a9a971;
  border-bottom: 5px solid #f36d52;
}
.i-panel__btn {
  width: 40px;
  height: 40px;
  font-size: 20px;
  font-weight: bold;
  color: #f4988a;
}
.i-panel__btn:hover {
  color: #c67eb0;
  background: #f4988a;
}
.i-panel__info {
  width: 100px;
  padding: 10px;
  font-size: 24px;
  font-weight: bold;
  color: #f4988a;
}